Consequences of Helicobacter pylori infection in children

Table 1 Prevalence of gastric atrophy in children

Author (yr)/country	Updated Sydney System	Mean age (range, yr)	No. of patients		Gastric atrophy and/or intestinal metaplasia (%)
			H. pylori+	H. pylori-	H. pylori+	H. pylori-
Whitney et al[28] (2000)/USA	Yes	10.7 (1-21)	42	0	Antral: 16.6/0	-/-
					Fundic: 2.3/0
Kolho et al[33] (2000)/Finland	Not reported	9.5 (2-16)	71	0	0/0	-/-
Campbell et al[34] (2001)/Gambia	Yes	1.4 (-/-)	21	16	0/0	0/0
Guiraldes et al[35] (2002)/Chile	No	12.2 (5-17)	59	14	0/0	0/0
Oztürk et al[36] (2003)/Turkey	Yes	12.2 (6-16)	18	9	Antral: 72.2/77.7	11.1/0
Guarner et al[29] (2003)/USA	Yes	- (1-17)	19	45	Antral: 52.6/15.7	22.2/0
					Fundic: 0/5.2	0/0
Usta et al[37] (2004)/Turkey	Yes	11.8 (4-17)	175	0	2.2/1.1	-/-
Levine et al[38] (2004)/Israel	Not reported	14.2 (-/-)	55	40	0/0	2.5/0
Ricuarte et al[27] (2005)/Colombia, Korea	No	12.0 (4-18)	97	18	16.4	1
		14.0 (8-18)	10	48	0	0
Kato et al[39] (2006)/Japan	Yes	11.3 (1-16)	131	65	Antral: 51.9/4.6	10.8/4.6
					Fundic: 34.8/0	8.3/4.2
Tutar et al[30] (2009)/Turkey	Yes	1.3 (0.1-2.0)	40	112	2.5/0	0/0
Kalach et al[40] (2009)/France	Yes	5.3 (0.1-17.7)	66	553	0/0	0.2/0.2

¹Atrophic mucosa: 31% as intestinal metaplasia; 63% as pseudopyloric metaplasia; 6% as both. H. pylori: Helicobacter pylori.